Coaster with raised sides



FIG. 1 is a perspective view of a coaster with raised sides, showing our new design;

FIG. 2 is a front view of thereof with a rear view, a left side view, and a right side view being mirror images;

FIG. 3 is a top view thereof; and,

FIG. 4 is a bottom view thereof. 

The ornamental design for a coaster with raised sides, as shown and described. 